Divergent strategy for the chemoselective synthesis of N-Arylbenzimidazoles and N-Arylindazoles from arylamino oximes
摘要:
An efficient and divergent synthesis of N-arylbenzimidazoles and N-arylindazoles from arylamino oximes based on reaction conditions selection was developed. The synthesis was approached by treating oximes with BTC and the chemoselectivity was regulated by the amount of Et3N. This switchable N-N and N-C bond formation process features mild reaction conditions, simple execution, high chemoselectivity and broad substrate scope. (C) 2020 Elsevier Ltd. All rights reserved.
Photolyse von 3-Methyl-2, 1-benzisoxazol (3-Methylanthranil) und 2-Azido-acetophenon in Gegenwart von Schwefelsäure und Benzolderivaten
作者:Thomas Doppler、Hans Schmid、Hans-Jürgen Hansen
DOI:10.1002/hlca.19790620134
日期:1979.1.24
Photolysis of 3-Methyl-2, 1-benzisoxazole (3-Methylanthranil) and 2-Azido-acetophenone in the Presence of Sulfuric Acid and Benzene Derivatives
硫酸和苯衍生物存在下对3-甲基-2,1-苯并恶唑(3-甲基蒽基)和2-叠氮基-苯乙酮的光解
Substituted aminophenylalkyl ketones, their preparation and use
申请人:Sterling Drug Inc.
公开号:US04539429A1
公开(公告)日:1985-09-03
Novel lower-alkyl 2-(hydroxyphenylamino)phenyl ketones, useful as inhibitors of lipoxygenase activity, are of the formula ##STR1## wherein R is hydrogen, lower-alkyl, lower-alkoxy or halo; R' is hydrogen or lower-alkyl; R" is hydrogen, lower-alkyl or halo; and Alk is lower-alkyl. The compounds are prepared by de-etherification of the corresponding alkyl or benzyl ethers which are in turn prepared by reacting a 2-(alkoxy- or benzyloxyphenylamino)benzoic acid with an alkyllithium.
Itier,J.; Casadevall,A., Bulletin de la Societe Chimique de France, 1969, p. 2342 - 2355
作者:Itier,J.、Casadevall,A.
DOI:——
日期:——
Synthesis of <i>N</i>-Arylindazoles and Benzimidazoles from a Common Intermediate
作者:Brenda C. Wray、James P. Stambuli
DOI:10.1021/ol101899q
日期:2010.10.15
A variety of N-aryl-1H-indazoles and benzimidazoles were synthesized from common arylamino oximes in good to excellent yields The product selectivity depends upon the base used in the reaction, as triethylamine promoted the formation of benzimidazoles, whereas 2-aminopyridine promoted the formation of N-arylindazoles This method is valuable to the synthetic community because both indazoles and benzimidazoles are prevalent in pharmaceuticals